Single-particle dynamics of the Anderson model: a two-self-energy description within the numerical renormalization group approach

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dc.creatorGalpin, Martin R.
dc.creatorLogan, David E.
dc.date2005-11-29
dc.date.accessioned2026-07-07T06:49:27Z
dc.date.available2026-07-07T06:49:27Z
dc.descriptionSingle-particle dynamics of the Anderson impurity model are studied using both the numerical renormalization group (NRG) method and the local moment approach (LMA). It is shown that a 'two-self-energy' description of dynamics inherent to the LMA, as well as a conventional 'single-self-energy' description, arise within NRG; each yielding correctly the same local single-particle spectrum. Explicit NRG results are obtained for the broken symmetry spectral constituents arising in a two-self-energy description, and the total spectrum. These are also compared to analytical results obtained from the LMA as implemented in practice. Very good agreement between the two is found, essentially on all relevant energy scales from the high-energy Hubbard satellites to the low-energy Kondo resonance.
dc.description12 pages, 6 figures
dc.identifierhttps://arxiv.org/abs/cond-mat/0511698
dc.identifierhttp://arxiv.org/abs/cond-mat/0511698
dc.identifierJ. Phys.: Condens. Matter 17, 6959 (2005)
dc.identifierdoi:10.1088/0953-8984/17/43/013
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/104353
dc.subjectStrongly Correlated Electrons
dc.titleSingle-particle dynamics of the Anderson model: a two-self-energy description within the numerical renormalization group approach
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